ERROR opening https://cactus.nci.nih.gov/chemical/structure/c14ccccc4n%28C%29cc1C%28%3DO%29C%28%3DO%29NC2CN3CCC2CC3/file?format=sdf&get3d=True  -- c14ccccc4n%28C%29cc1C%28%3DO%29C%28%3DO%29NC2CN3CCC2CC3 could not be loaded.